Boring-tool.



R. C. NEVIN.

BORING TOOL.

APPLIOATION FILED JUNI; 15, 1912.

1,059,335,` Patented Apr. 15,1913.

www

-h'LI I maw mlalm "ml Witnesses x Inventor i Attorney/ commun PMNouRM-llcu.. wAsllNn'mN, [n c,

l UNTED sinrrnsaN ROBERT c; Nevin, or LANsINenmoHIGAN.

BORING-moon.

Application filed .Tune 15, 119112.` Serial No.1703,95`9.

Specification of Letters `Patent.`

Patented Apr. 15, 191e.;

To all whom, t may concern Be it known that I,`R`onnr C. Nnvir, acitizen of the United .Statespresiding at Lansing,in the `county ofInghainand State of Michigan, haveiinvented a new and usefulBoring-Tool, of which the following is a specification.

This invention: relates ,to i an :improvement in boring tools. p

The primary objectof the invention is to provide a tool holder for usewhere the work is stationary and `the .i spindle of the machine revolvescarrying theboring head` and the cutting tool, with` 1means whereby thetool may be adjusted without removing the same from thehead ori removingthe head from the machine.

In the drawings: Figure 11 is an elevation. Fig.`2 is a perspective Viewof the parts disassembled, Fig. `3 is anelevation partly in section.Fig. 4 isa zsectionptaken; on .the line 4-4 of Fig. 3. Fig,` 5 is asection on the line 5-5 of Fig.` 3. Fig. 6 is a view showing a slightlymodified zform. Fig.7 is a view showing astill further modification.Fig. 8 is a detailview of lthetool holder shownzin Fig. 7. Fig. `9 is asection on the line 9-9 `of Fig. 6;

In the drawings 10 `designatesthe head which isprovided with the shank11 iwhich is supported `bythe machine inthe usual manner. Thehead `10 isprovided {withthe reduced screw threaded extension `12 `which is formedwith the diagonally disposed extensions 14 and 15, Jthese extensionsbeing;

formed with the curved surfaces 16. The head is embracedbytheisleeve 17which is interiorly screw threaded and s exteriorly knurled, one of itsends being formed with the recess 18. A screw 119 is `supported by thehead, said screw beingdisposed within the` recess 18, the same limiting`the movement of the `sleeve on `the head. The tool holder 20 isarranged withingthe head,said tool holder being formed with the substan`tially spherical: body portion 21 which is formed with the flatsurfaces`21 which are disposed between the extensions 14 and l5 of the head 10,`the tool holderthus being supported to move between said; extensions.The tool holder is formed withthe tail piece 22 which terminatesin thethreadedtransversely disposed extension `41. The toolis received by theslotted exteriorly screw threadedportionz24 `oftheholder,this por- 55 ition beinggembraced by the nut 25 the tool l in this manner `being heldagainst displacei ment. The tail piece 22 extends within the. head andis engaged by the transversely disposed screw 26 which is rotatablysupported 160 by the head, the thrustycollars 27 and 1281 forming abearing for the screw. The screw is rotated bythe head 29the portion ofthe head 1() adjacent the screw head being proi vided withigraduations30, the screw being 1 formed with indicating lines 31. It will be notedbylthisconstruction that the move-` ment of the `tail piece may beaccurately` regulated.`

The many `advantages of atool holder of 170 this construction will beclearly apparent` as i `it will benoted that the same providesiastructure which allows for an easy and accurate adjustment of the toolwithout` removi ing the same from the holdei` or the holder i` from themachine.

In theform shown in Fig. 6 the tool holder `consists ofthe sphericalmember 321 which is slotted to receive the tool 42, the` sleeve 38contacting-with the tool holder to 80 maintain the tool againstdisplacement. The spherical member 32 is formed with the `tail piece 34which is offset from the member; and which is` actuated by the screw 35inthe same manner as inthe preferred form.` The 185 member 82 ismaintained against rotation by the key 36 which is se'ated in the head37,` the same extending within the slot 38 in ther member.`

In `the formshown in Fig. 7 the spherical 90` member 39 is formed withthe slotted tool receiving `member 40 which receives a nut as in thelpreferred form.

What is claimed is:

1. A. tool holder consisting of a head, said` head beingformed with ascrewthreaded extension, `rounded extensions formed in+ tegral with saidhead, a sleeve, the upper interior portion of which is screw`threaded,

a tool holder mounted between said rounded transverselyot said head,said' screw engag- `105 1 ing the screw threaded extension of the tailpiece tomove the same laterally within the i head? 2v. v A tool holderConsisting of a head, said headpbeing formed With extensions, `a toolholder disposed ybetween said extensions, a

' sleeve embracing lsaid extension and a por- 10 ing adapted to engagesaid screw threaded` Copies" of this patent may 'be obtained for vecents: each, by addressing the` Cammi@Sidney,ofPatent;E

` Washington, 11.0., j

extension to move said extension trans,-

versely of said head. l -v 1 f In testimony that I claimv the foregoingas my ovvn,-I haverheretoaxed my signature l lin the presence lof' tvvoWitnesses.

ROBERT o. NEviN.

`Witnesses i ADELBERT MOSHER,

DAN `IIELIK.`ER.`

